Comp Sci 2 Test
Which of the following best explains how messages are typically transmitted over the Internet?
The message is broken into packets. The packets can be received in any order and still be reassembled by the recipient's device.
Which of the following statements best explains the ability of the network to provide fault tolerance?
The network is considered fault-tolerant because there are redundant paths between each pair of devices.
Emilee is watching an online video. The video is being sent to her laptop by a server over the Internet which splits the video into packets and sends them in the order they appear in the video. Which of the following is true about how the packets will arrive at her computer?
The packets may arrive out of order
This diagram shows a number of computing devices connected to the Internet with each line representing a direct connection. Device A is attempting to send data over the Internet to Device E. Which of the following is true of how the data will travel through the network?
It is possible that the data travels through any of the devices in the network before arriving at device E
The figure below represents a network of physically linked devices, labeled A through H. A line between two devices indicates a connection. Devices can communicate only through the connections shown. What is the minimum number of connections that would need to be removed from the network in order for device A to not be able to communicate with device F?
2
This diagram shows a number of computing devices connected to the Internet with each line representing a direct connection.What is the MINIMUM number of paths that would need to be broken to prevent Computing Device A from connecting with Computing Device E?
3
Jesse purchases a new smartphone and is immediately able to use it to send a photo over the Internet to a friend who lives in a different country. Which of the following is NOT necessary to make this possible?
A single direct connection is established between any two devices connected to the Internet
Which of the following situations is most likely to cause issues arising from the digital divide?
A state makes voter registration forms available only by visiting a government website
The way in which information travels on the Internet, not as a single piece but in chunks.
Datastream
Pick the two statements that are true about the Internet Protocol (IP):
Each device or computer on the Internet is assigned a unique IP address. IP is the shared way that all devices and computers label their messages with the sender and receiver's addresses.
Which of the following Internet protocols is used to request and send pages and files on the World Wide Web?
HyperText Transfer Protocol (HTTP)
Which of the following best describes the purpose of an IP address?
IP addresses provide a unique number for identifying devices that send and receive information on the Internet
The figure below represents a network of physically linked devices, labeled A through F. A line between two devices indicates a connection. Devices can communicate only through the connections shown.
If devices B and D were to fail, then information sent from device A could not reach device C. If devices D and F were to fail, then information sent from device A could not reach device C.
Which of the following is a primary benefit of making a computing system fault-tolerant?
If one component of the system fails, users of the system can often still access it.
Which of the following is true regarding the way information is transmitted on the Internet?
Information does not travel in one piece, but rather as a datastream of packets.
Rules for addressing and sending data across the internet by assigning unique numbers to each connected device
Internet Protocol (IP)
Describe how the Internet Protocol (IP) allows devices to easily connect and communicate on the Internet.
The Internet Protocol allows devices to easily connect and communicate on the internet by allowing messages to have a clear sender and destination that allows proper information to be sent to the proper destinations.
Choose the two statements that best describe the relationship between HTTP and the World Wide Web
The World Wide Web is a collection of pages and files that is shared between computers using HTTP HTTP and the World Wide Web both rely on other layers of protocols for sending information on the Internet
Which of the following best describes the relationship between the World Wide Web and the Internet?
The World Wide Web is a system of linked pages, programs, and files that is accessed via a network called the Internet.
Pick Two: If the post office delivered mail exactly like the routers deliver messages on the Internet, which of the following statements would be true?
The mailman would sometimes take a different path to deliver each letter to your home Letters would be written on the outside of the envelope for all to read instead of letters put inside envelopes
Which of the following best describes the protocols used on the Internet?
The protocols of the Internet are open and used by all devices connected to the network
Which of the following is true of how the Internet has responded to the increasing number of devices now using the network?
The protocols of the Internet were designed to scale as new devices are added
Takes inventory of all packets in the datastream to ensure they are successfully sent and received.
Transmission Control Protocol (TCP)
Which of the following Internet protocols is MOST important in reassembling packets and requesting missing packets to form complete messages?
Transmission Control Protocol (TCP)
Sends all packets without checking whether they were received or ordered properly
User Datagram Protocol (UDP)
computing system
a group of computers working together for a common purpose
computing network
a group of connected computers that can send or receive data
computing device
a machine that can run a program
path
a sequence of direct connections
Which of the following best explains how fault tolerance in a network is achieved?
By providing multiple paths between devices, enabling routing to occur even in the presence of a failed component
Which of the following is a primary reason for the use of open protocols on the Internet?
Open protocols provide a way to standardize data transmission between different devices.
Chunk of data and its metadata, used to route and reassemble information on the Internet.
Packet
Which of the following is true of how packets are sent through the Internet?
Packet metadata is used to route and reassemble information travelling through the Internet
Which of the following is MOST likely to be an outcome of the digital divide?
People from some racial or ethnic groups have unequal access to computing technology.
What are the benefits of building redundancy into a network? What are the potential issues with building redundancy?
Redundancy can be a backup if individual components fail by having more than one path between any two connected devices in a network. Message can last longer to transmit.
An Internet Service Provider (ISP) is a company that builds the routers and wired connections that allow individuals to access the Internet. An ISP is considering adding additional redundant connections to its network. Which of the following best describes why the company would choose to do so?
Redundant networks are more reliable
Two devices are connected to the Internet and communicating with one another. A squirrel chews through one of the wires in the network that is currently being used by the devices to communicate. The network immediately begins using a different path through the network and communication continues as normal.
fault-tolerance
In your own words explain the following about the Domain Name System What problem does the DNS solve? How does the DNS help the world wide web scale so that billions of users can access billions of web pages?
the problem that DNS, or the domain name system, solves is that it is responsible for translating domain names into IP addresses. DNS helps the World Wide Web scale since it is used by many different computers that are all connected to the network. DNS servers are also connected in a distributed hierarchy and are divided into zones, which splits up the responsibility for major domains. The DNS and the Internet Protocol are designed to scale no matter how much the Internet grows.
